Safety helmet



FIG. 1 is a front perspective view of a safety helmet showing my new design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a bottom view thereof;

FIG. 5 is a front elevational view thereof;

FIG. 6 is a rear elevational view thereof; and,

FIG. 7 is a side elevational view taken from the left side of FIG. 1, the right side elevational view being the mirror image thereof. 

The ornamental design for safety helmet, as shown and described. 